According to a recent issue of the National Geographic Traveler magazine, the annual average number of vacation days for some countries are as follows : Germany, 35; Italy, 42; France, 37; U. S, 13; Japan, 25; Canada, 26; Britain, 28; Brazil, 34. For the above data, find a) Mean, b) Standard deviation, c) Five number summary, d) Draw the box-and-Whisker plot.'